Briggs & Stratton Engine Spark Plugs
All Models except Vanguard Models	J19LM
Vanguard Spark Plug	RC12YC
Kohler Spark Plug
K90, K91, K121, K141, K161, K181, K330, K331	J19LM
K241, K301, K321, K341, K361, K532, K582, K660, K662 M8, M10, M12, M14, M16	H10C
CH6, CH5, CH11, CH12.5, CH14, CH18, CH20, CH22, CH25 CV11, CV12.5, CV15, CV18, CV20, CV22	RC12YC
MV16, M18, MV18, M20, KT17, KT19, KT20, KT21	RV17YC
Tecumseh Engine Spark Plugs
TV590, TNT100, TVS100, TVS105, TVXL705, TVS115, TVS120	J19LM
H35, LHL35, HS40, LAV40, V40, VH40, 5.0/ H50, HS50, VH50, LAV50, TVM125,V50, 6.0/ H60, V60, HH60, VH60, HH60, VH60, TVM140 7.0/ H70, HM70, TVM170, TVSL170, V70, VH70, VM70, HH70 8.0/ H80, HH80, HM80, TVM195, TVXL195, HHM80, V80, LH80, VM80 9.0/ HM90 10.0/ HH100, HM100, VH100, VM10, TVM220, TVSL220 12.0 HH120	J19LM
OHV11, OVM120, OHV12, OVXL120, OHM120, OHV125, OVXL125, OHV13	L86C
HH130, HH140, OH140, HH150 HH160, OH160	L82C